When the magnetic field is constant and the armature current is constant, the speed is adjusted by changing the armature voltage for constant torque speed control. At this time, the running state is constant torque operation. Above the base speed, when the field weakening speed is increased, the armature voltage is constant, and the speed is adjusted by changing the magnetic field excitation to adjust the speed for constant power. The operating state at this time is constant power operation. If it is not to keep the armature current constant, just turn it on when it is powered on, and stop it when it is powered off, and the torque and current will fluctuate with the load. If you use a DC permanent magnet brushed motor, the magnetic field is constant. If your control system has current control, you can keep the armature current constant and adjust the speed by changing the armature voltage.
Zibo Zemei Motor Co., Ltd.
Address: Bei'an, Zhoucun District, Zibo City
Zemei Electric Wenzhou Office
Address: Qiaoertou, Lucheng District, Wenzhou